XL2000: "Type Mismatch" Comparing String Variable to Boolean

In Microsoft Excel 2000, when you run a macro that runs successfully in Microsoft Excel 95 or earlier, you may receive the following error message:

This problem may occur when the macro compares a String variable to a Boolean variable.

In Microsoft Excel, a variable that you define as a String type cannot be compared to the Boolean values True or False without generating a run-time error.

This behavior is by design of Microsoft Excel.

To work around this problem, define the variable that you want to compare to a Boolean variable as Variant instead of String; you can compare a Variant variable to a Boolean variable without generating an error. For example, if the macro contains a line similar to the following

replace it with the following line:

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The following macro generates a type mismatch error in Microsoft Excel 2000. However, it does not generate the error in Microsoft Excel 95 or earlier:


The previous example fails with a type mismatch error at the following line

because the macro compares a string variable to the Boolean value False.

The following functions may return either a String or Boolean value:

To avoid the type mismatch error when you compare a variable to a Boolean value returned from these functions, define the variable as Variant.